Source: Pats not taking CB Jackson to Germany - eviltoast
Patriots cornerback J.C. Jackson is not expected to travel with the team to Frankfurt, Germany, for Sunday's game against the Colts, a source confirmed.

Excerpt from the article:

NFL Network first reported that Jackson won’t travel for the game, citing questions about his reliability. A source told ESPN that Jackson missed curfew at the team hotel Saturday. SI.com had previously reported that Jackson was late to the hotel.